Machine for treating rubber.



BEST AVAILABLE COP.

W. KEARNS.

MACHINE FOR TREATING RUBBER.

APPLICATION FILED mu 1!. 1911.

1,277,729. PatentedSept. 3,1918..

3 SHEETS-SHEET l.

: In ventor:

by Vivia [cal-rm",

[11's Atty W. KEARNS.

MACHINE FOR TREATING RUBBER.

APPLICATION FILED JULY 11. 1917.

1,277,729. PatentedSept. 3,1918.

3 SHEETS-SHEET 2.

IHII

bis Atty by W W. KEARNS.

MACHINE FOR TREATING RUBBER.

APPLICATION FILED JULY 11. 1911.

1,277,729. Patented Sept. 3,1918.

3 SHEETSSHEET 3.

Attest: if lnientor: by 1 mm ear/2s,

bis Atty ran PATENT ormos.

WiL-ELIALH gmanirsgor IBETROIT, MICHIGAN, lassrcnon'ro momma & WRIGHT, a

' oo POR'A'r oN or mronrean.

:MACHINE FOR-TREATING RUBBER.

Patented-Sept. 3, 1918.

Tali ill {nail Tamara:

. Be it'knownlthat I,-WILLIAM KnA'RNs, a

., citizen bf;., tl 1e :United ,States, and. a resident 01f Detroihfcounty of Wayne, and State of have invented certain new and usefulimprovements in Machines for Treati'ng ubber, 'ofwhich thefollowing isafull,

, clear, and exact description.

Edy-invention relates to machines for treatirigrribben, and more particularly to a calendering niachineespecially adapted for use in the production of tread stock for vehicle tires. 3'

Therproduit of machines heretofore used has .beencharacterize'd by, inequalities in the gage of the stock and in the density thereof, with, result-ant absence of uniformity in the weightrof the tread. I Furthermore, there were presentat times surface imperfections, such as waves and wrinkles on the surface of the stock, and there was atendency toward, imperfectionsin the stock due to the imprisonment of air within the body of the plastic composition. o

-.A machine. made in accordance with my ini ention is so constructed that the rubber stock. before passing between some of the calenderingrolls, and after it has been brought approximately to gage, will be subsity and minimizing a tendency toward the development. of surface imperfections. By associating a presser mechanism with each roll intermediate the first and the last roll of the sequenceembodied in the calendering Inachine, lam-enabled to secure more satisfac- "tory. results, although fairly satisfactory results have been obtained by the use of a single presser'mechanism of this character.

order to. adapt the machine for the pro- ,;.di 1.ct-.ion of stoclt'iofgdifferent thicknesses, the

presser mechanism or mechanisms above referred to, are each provided with means cordance with my invention, when the calendering rolls are used in gangs for the purpose of multiplying the product ofthejma chine, to provide suitable stays or. reinforcements for imparting the desired rigidity to said presser mechanism, or mechanisms and preventing the warping thereof in a manner to have a. tendency to develop irregularit-yor variances in the the gage of a sheet produced. I have secured the best re sults by embodying in each of said presser mechanisms, a-banking roll adapted to be turned through engagement of the rubber stock therewith, and its movement relatively thereto. 7

The. invention consists in the novel features of construction and combination of parts hereinafter set forth and described,-

mechanisms at the, back of the machine; and.

Fig. 3 a similar view of one of said mech-- anisms at the front of "the machine.

Like numerals refer to like parts throughout the several views.

In the embodiment of myinvention shown in the accompanying drawings, the calender rolls, four in number, are shown at 10, 11, 12 and 13. The last of these rolls, 13, has a surface so formed as to bring the finished product to the desired final shape. The vari-, ens rolls 10, ll, 12 and 13, are all power driven, preferably at substantially thesame peripheral velocity. Between the rolls 10 and 11, I have indicated at 14, a bank'of rubber composition to be passed through the machine. 1 The rubber introduced at this point, will be. gradually fed from the bank thus provided between the rolls 10 and 11, about the roll 11 tobetween the rolls 11 and 12" and about the roll 12 to between the rolls 12 and 13, successively, the various rolls being so set as to secure the desired gradual reduction in the thickness of the stock while passing through the machine, to bring'it to the desired gage.

' In the path of the material, as it passes about the roll 11 and just as it is about to pass between the rolls Hand 12, is a presser mechanism adapted to act upon said maloterial in a manner to both condense same and remove surface and concealed imperfect-ions therefrom. This mechanism preferably comprises a banking roll 15 mounted in plates 16. To permit. adjustment of the 15 roll 15 toward and from the roll 11, I mount the-plates 16 in ways 1'? formed upon the side frames 18. Acting upon each If the plates 16 isan adjustment screw 19 adapted to engagethe removable stop-bar20 (on- 20 necting the plates 16.- The frames 18 are adjustably mounted uponparallel bars 21 extending transversely of the machine. The plates 16 ,are, provided with the usual part- 1ng sections 22 .for preventing excessive '25 lateral displacement) of the rubber stock passing through" the machine. Adjacentthe roller 12, I arrange a second presser mechanism, embodying therein a banking roll 23. If desired this roll 23 may extend continuously throughout the entire width of the machine, or of the calender roll cooperating therewith, althoughpreferably I make it in a plurality of independent sections, each of which is mounted by means of suitable ball or roller bearings 24 upon the shaft 25 Each of said sections corresponds in width with that of the strip to be produced. If desired, a single roll 23 may be used, but preferably a machine madein accordance with my invention includes a gang of such rolls 23. and calenderiug rolls of sufficient width to permit the simultaneous production of a plurality of such strips.

The supports 26 for the shaft 25 are suspended from a bar 27 by means of the rackets 28 and adjustment screws 29 in a manner to permit the adjustment of the Various banking rolls 23 toward and from the roll 12in setting said rolls 23 to conform to the setting of the rolls 11 and 12.

With a fairl wide machine there is a tendenc of the ar 27 to spring or warp interme iate the end supports thereof, and to counteract this tendency, I provide the machine with a stiff brace bar 30, having mounted thereon one or more screw-bolts 31, acting upon the blocks 28 intermediate the ends of said rod 27. In this manner a suitable support for the shaft 25 and the rolls 23 intermediate the ends thereof, is provided.

Throughout the machine. suitable locknuts are provided to minimize the tendency toward a loss in the adjustment of the ma- 55 chine as a result of the vibrations due to the' it receives its final form and finish.

scribed machine is as follows:

A batch of rubber composition is fed between the rolls 1011 forming a bank 14, which is gradually passed between said rolls and about the roll 11 to between said roll and the roll 12. As the strip of rubber composition reaches the banking roll 15, the

major portion thereof will be subjected to a pressure which will have the effect of con- 30 densing it and releasing any air imprisoned therein. The roll 15 being set so as to have the space between same and the roll 11, no greater (and preferably less) than the space between the rolls 10 and 11, a portion 35 of the strip will bank adjacent said banking roll 15, the surplus of stock created at this point being worked into the succeeding stock passing said banking roll.

As the strip stock leaves the roll 15, it passes between the rolls 11 and 12 and is further worked and compacted. Thereafter while itis passing about the roll 12, the stock is brought within the operating range of the banking roll 23, where the action described in connection with the roll 15 is repeated.

After leaving the roll 23, the stock passes between the calender rolls 12 and 13 where By subjecting the sheet or strip stock'to the action of a banking roll such as 15 or 23,

'while it is passing from between one pair of calender rolls to between another pair, I divide the bank which would normall}- form between said last named rolls, and thus not only secure a more thorough working of the stock, but relieve it from those surface stresses which have a tendency to form surface imperfections. F urthcrmore, the banking roll will compact or condense the stock just prior to its passing between the adjacent calendering rolls. thus causing greater uniformity in its thickness.

By using a roll, 15 or 23, cooperating with a roll or rolls intermediate the first and last rolls of the sequence of rolls embodied in the machine capable of being driven by the, engagement of the moving stock therewith. I secure a better compacting action and avoid disturbance of the surface of the strip or sheet as the result of a drag at this point.

The adjustability of the rolls 15 and 23. permits these rolls to be properly spaced with relation to their cooperating calender 125 roll and in accord with otheradjustn'ierits in the machine.

By arranging the banking rolls in gangs. the output of the machine may be multiplied.

It is not my intention to limit the inven-i-lso tionto the precise details .of construction shown in the drawings, it being. apparent that'such may be varied without departing from the spirit and scope of the invention.

Having described the ilWGHiLiOI}, what I claim as newand desire to protect by Letters Patent is: 1. A machine for treating rubber, embody- 'ing therein a sequence of calendering rolls adapted to act successively upon the stock passing through the machine, and a nondriven presser mechanism having a convex surface cotiperating with one of said rolls intermediate the first and last rolls of the sequence, whereby the stockis compacted and banked as itis about to pass between succeeding calendering rolls;

A machine for treating rubber, embodying therein a sequence of calendering rolls including a plurality of rolls intermediate the first and last rolls of the sequence, and a plurality of presser mechanisms having con-' vexed surfaces cooperating with said intermediate rolls respectively, whereby the stock is compacted and banked as it.' is about to pass between succeeding calendering rolls.

1 3. A machine for treating rubber, embodying therein a sequence of calendering rolls adapted to act successively upon the stock passing through the machine, a. non-driv n pressermechamsm having a convexed Stifface 'cooperatlng with one of said rolls intermediate thefirst and last rolls of the sequence, whereby the stock 'is compacted and banked .as itis about to pass between succeeding calendaring rolls, and means whereby said presser mechanism may be adjusted toward or from its cooperating roll.

4, A machine for treating rubber, embodying therein a sequence of calendering rolls including a pluralitv of rolls intermediate the first and last rolhs ofthesequence, :1 hirality of presser mmrilnanismhaving convexed surfaces with said intermediate rolls respesiiiweily, whereby the stock is compacted and hmmlked as it is about to pass between calendering rolls, and independently means whereby each of said prem mechanisms may be adjusted toward or from its cooperating calendering rolls.

5. A machine fol-treating rubber, embodyjing therein a sequence of calendaring rolls 'adapted to act suece$ive1y upon the stock passing through the machine, and an idler banking r011 mounted adjacent and cooperating with one of said rolls intermediate the first and last of the sequence whereby the stock is compacted and banked as it is about to pass between succeeding calendering rolls.-

6. A machine for treating rubber, embodying therein-a sequence of calendering rolls including a plurality of rolls intermediate the first and last rolls of the sequence, and a plurality of banking rolls cooperating with tioned roll.

BEST AVAlLABLE COP\ I said intermediate rolls respectively, whereby the stock is compacted and banked as it is about to pass between succeeding calenden ing rolls.

7. A machine for treating rubber, embodying therein a sequence of calendering rolls adapted to act successively upon the stock passing through the machine, an idler banking roll mounted adjacent and cooperating with one of said rolls intermediate the first and last of the sequence \vhereby the stock is compacted and banked as it is about to pass between succeeding calendering rolls,

and means whereby said banking roll may ing therein a sequence of calendering rolls adapted to act successively upon the stock passing through the machine, an auxiliary idler roll mounted adjacent and cooperating with one of said rolls of the sequence, and means for positively driving sa-idlastmen- 10. A machine for treating rubber, embodying therein a pair of: calendering-rolls, one of saidrolls having a circumferential depression for cooperating with said other roll to define the sectional contour of the rubber passing therebetween, an auxiliary idler roll adjacent and cooperating with the other roll of said pair, and means for positively driving said pair of rolls. -11. A machine for treating rubber embodying therein a. pair of oalendering rolls and a non-driven presser mechanism havin a convexed surface cooperating with one o said rolls whereby the stock 1s compressed previous to its passage between said calendering rolls. I

12. A machine for treating rubber embodying therein a pair of calendering rolls and an auxiliary idler roll mounted adjacent and cooperating with one of said calendering rolls whereby the stock is compacted revious to its passage between said calen ering rolls.

13. A machine for treating rubber embodyin therein a pair of calendering rolls, anonriven presser mechanism having a convexed surface cooperating with one of said rolls whereby the stock is compressed previous to its passage between said-calendering rolls and means whereby said resser mechanism may be adjusted toward or from its cooperating roll.

14. A machine for treating rubber embodying therein a pair of calendering rolls, an auxiliary idler roll mounted adjacent and cooperating with one of said calendering rolls whereby the stock'is compacted previous to its passage between said calendering rolls, and means whereby said idler roll may be adjusted toward or from its cooperating calendering roll.

15. A ,machlne for treating rubber em bodyingtherein a pair of calendaring rolls, a .presser mechanism having a convex-surface cooperating with one of said rolls whereby the stock is compressed previous to its passage between-said calendering rolls,

and a parting plate for the calendering rolls positioned at each end of the presser mechanism. I

-- 16. A machine for treating rubber embodying therein a pair of calendaring rolls, an auxiliary roll mounted adjacent and cooperating with one of said calendering rolls whereby the stock is compacted previous to a pair of parting plates for said calendering rolls, and a roll journaled in said plates 00- operating with one of said calendering rollswhereby the stock is compacted previous to its passage between said calendering rolls.

19. A machine for treating rubber embodying therein a pair of calendering rolls, a presser mechanism having a convex surface cooperating with one of said rolls whereby the stock is compressed previous to its passage between said calendering rolls, a parting plate at each end of the said mechanism for limiting the width of thematerial passing said mechanism.

20. A machine for treating rubber embodying therein a pair of calendering rolls, a presser mechanism having a convex sur face cotiperating: with one of said rolls whereby the stock is compressed previous to its passage between said calendering rolls,

and a parting plate for said mechanism and calendering rolls at each end of the said mechanism for limiting the width ofthe material passing said mechanism and calendaring rolls.

21. A machine for treating rubber em bodying therein a pair of calendering rolls, a presser mechanism cooperating with one of said rolls whereby the stock is compressed previous to its passage between said calendering rolls, a parting plate positioned at each end of the presser mechanisms, and means for adjusting the parting plates relative to the calendering roll with which the said mechanism cooperates.

Signed at Detroit, county of Wayne, State of Michigan, this 12th day of July, 1917.

WILLIAM KEARNIS. 

